Syil provide in the full kit three nifty little photo interuptors for the homing or limit switches.
They are made up with the necessary resistor soldered in line and a length of cable and a connector
which plugs straight into the break out board.
I think normaly you also get some little tabs to do the interupting but mine got forgot.
No big deal I just made some of my own.
Now the question I would have liked to discuss before doing this with some experienced people is about limits or homing.
I have decided for now to go with limits on each end of the Y travel. (160mm)
According to the Mach3 help file, limits can be homing as well.
For the X I went for both limits and a separate switch for the homing.
That comes into play about one third of the way along the travel. (420mm)
It will be fairly easy to adjust or alter altogether this setup if I find it not the best option.
Don't know whether I need one on the Z or not.
I have in mind to make a tool height setting switch. They probably have a proper name???
The pics are of the Y setup. X is the same except double switches.
Tight fit
But they will be well protected under there.